Rudy Giuliani and Mitt Romney are leading the GOP presidential cash contest, with both campaigns reporting yesterday they’d pulled in more than $15 million in the last fund-raising period for use in the primaries.

The former mayor reported taking in more than $17 million in combined general-election and campaign money in the second fund-raising quarter, from April through June.

Sources said more than $15 million was expected to be earmarked solely for the primaries.

He was left with $18 million in the bank, campaign officials said – putting him ahead for money stashed away versus cash spent.

Romney, who has been on the air with TV ads, raised $14 million from donors – all for spending in the primary.

But both candidates had several times the amount of money socked away that free-falling former front-runner Sen. John McCain reported having.

The Arizona maverick’s aides revealed on Monday they’d raised just $11 million in the last quarter, the second disappointing showing in a row.